<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8" />
        <title>UI界面元素-默笙后台管理系统</title>
        <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
        <meta content="这不仅仅是一个后台管理系统，它基于BT4，超强的自适应，简洁，高效，大方" />
        <meta content="Mosheng" name="author" />

        <!-- App favicon -->
        <link rel="shortcut icon" href="assets/images/favicon.ico">

        <!-- App css -->
        <link href="css/bootstrap.min.css" rel="stylesheet" type="text/css" />
        <link href="css/icons.min.css" rel="stylesheet" type="text/css" />
        <link href="css/app.min.css" rel="stylesheet" type="text/css" />

    </head>

    <body>

        <!-- Navigation Bar-->
        <header id="topnav">
            <nav class="navbar-custom">

                <div class="container-fluid">
                    <ul class="list-unstyled topbar-right-menu float-right mb-0">

                        <li class="dropdown notification-list">
                            <!-- Mobile menu toggle-->
                            <a class="navbar-toggle nav-link">
                                <div class="lines">
                                    <span></span>
                                    <span></span>
                                    <span></span>
                                </div>
                            </a>
                            <!-- End mobile menu toggle-->
                        </li>

                        <li class="dropdown notification-list">
                            <a class="nav-link dropdown-toggle arrow-none" data-toggle="dropdown" href="#" role="button" aria-haspopup="false" aria-expanded="false">
                                <i class="fe-bell noti-icon"></i>
                                <span class="badge badge-danger noti-icon-badge">2</span>
                            </a>
                            <div class="dropdown-menu dropdown-menu-right dropdown-menu-animated dropdown-lg">

                                <!-- item-->
                                <div class="dropdown-item noti-title">
                                    <h5 class="m-0">
                                        <span class="float-right">
                                            <a href="" class="text-dark">
                                                <small>清除所有</small>
                                            </a>
                                        </span>通知</h5>
                                </div>

                                <div class="slimscroll noti-scroll">

                                    <!-- item-->
                                    <a href="javascript:void(0);" class="dropdown-item notify-item active">
                                        <div class="notify-icon">
                                            <img src="assets/images/users/avatar-2.jpg" class="img-fluid rounded-circle" alt="" /> </div>
                                        <p class="notify-details">彼得</p>
                                        <p class="text-muted mb-0 user-msg">
                                            <small>嗨，你好吗？下次会议怎么样？</small>
                                        </p>
                                    </a>

                                    <!-- item-->
                                    <a href="javascript:void(0);" class="dropdown-item notify-item">
                                        <div class="notify-icon bg-light">
                                            <i class="mdi mdi-comment-account-outline"></i>
                                        </div>
                                        <p class="notify-details">Caleb Flakelar 管理员点评
                                            <small class="text-muted">一分钟前</small>
                                        </p>
                                    </a>

                                    <!-- item-->
                                    <a href="javascript:void(0);" class="dropdown-item notify-item">
                                        <div class="notify-icon">
                                            <img src="assets/images/users/avatar-4.jpg" class="img-fluid rounded-circle" alt="" /> </div>
                                        <p class="notify-details">凯伦·罗宾逊</p>
                                        <p class="text-muted mb-0 user-msg">
                                            <small>真的！这个管理员看起来不错，设计很棒。</small>
                                        </p>
                                    </a>

                                    <!-- item-->
                                    <a href="javascript:void(0);" class="dropdown-item notify-item">
                                        <div class="notify-icon bg-light">
                                            <i class="mdi mdi-account-plus"></i>
                                        </div>
                                        <p class="notify-details">新用户注册通知
                                            <small class="text-muted">5小时之前</small>
                                        </p>
                                    </a>

                                    <!-- item-->
                                    <a href="javascript:void(0);" class="dropdown-item notify-item">
                                        <div class="notify-icon bg-light">
                                            <i class="mdi mdi-heart"></i>
                                        </div>
                                        <p class="notify-details">哦
                                            <b>Admin</b>
                                            <small class="text-muted">13天之前</small>
                                        </p>
                                    </a>
                                </div>

                                <!-- All-->
                                <a href="javascript:void(0);" class="dropdown-item text-center text-primary notify-item notify-all">
                                    查看全部
                                    <i class="fi-arrow-right"></i>
                                </a>

                            </div>
                        </li>

                        <li class="dropdown notification-list">
                            <a class="nav-link dropdown-toggle nav-user mr-0" data-toggle="dropdown" href="#" role="button" aria-haspopup="false" aria-expanded="false">
                                <img src="assets/images/users/avatar-1.jpg" alt="user-image" class="rounded-circle">
                                <small class="pro-user-name ml-1">
                                    Admin
                                </small>
                            </a>
                            <div class="dropdown-menu dropdown-menu-right dropdown-menu-animated profile-dropdown ">
                                <!-- item-->
                                <div class="dropdown-header noti-title">
                                    <h6 class="text-overflow m-0">欢迎 !</h6>
                                </div>

                                <!-- item-->
                                <a href="javascript:void(0);" class="dropdown-item notify-item">
                                    <i class="fe-user"></i>
                                    <span>我的账户</span>
                                </a>

                                <!-- item-->
                                <a href="javascript:void(0);" class="dropdown-item notify-item">
                                    <i class="fe-settings"></i>
                                    <span>设置</span>
                                </a>

                                <!-- item-->
                                <a href="javascript:void(0);" class="dropdown-item notify-item">
                                    <i class="fe-lock"></i>
                                    <span>锁定屏幕</span>
                                </a>

                                <div class="dropdown-divider"></div>

                                <!-- item-->
                                <a href="javascript:void(0);" class="dropdown-item notify-item">
                                    <i class="fe-log-out"></i>
                                    <span>退出</span>
                                </a>

                            </div>
                        </li>

                    </ul>

                    <ul class="list-inline menu-left mb-0">
                        <li class="float-left">
                            <a href="index.html" class="logo">
                                <span class="logo-lg">
                                    <img src="assets/images/logo.png" alt="" height="18">
                                </span>
                                <span class="logo-sm">
                                    <img src="assets/images/logo-sm.png" alt="" height="28">
                                </span>
                            </a>
                        </li>
                        <li class="app-search">
                            <form>
                                <input type="text" placeholder="输入关键字以搜索..." class="form-control">
                                <button type="submit" class="sr-only"></button>
                            </form>
                        </li>
                    </ul>
                </div>

            </nav>
            <!-- end topbar-main -->

            <div class="topbar-menu">
                <div class="container-fluid">
                    <div id="navigation">
                        <!-- Navigation Menu-->
                        <ul class="navigation-menu">

                            <li class="has-submenu">
                                <a href="index.html">
                                    <i class="fe-airplay"></i>仪表盘</a>
                            </li>

                            <li class="has-submenu">
                                <a href="#">
                                    <i class="fe-layers"></i>组件</a>
                                <ul class="submenu">
                                    <li>
                                        <a href="components-elements.html">UI 界面元素</a>
                                    </li>
                                    <li>
                                        <a href="components-rangeslider.html">范围滑块</a>
                                    </li>
                                    <li>
                                        <a href="components-alerts.html">提示</a>
                                    </li>
                                    <li>
                                        <a href="components-ribbons.html">文章块</a>
                                    </li>
                                    <li>
                                        <a href="components-sweet-alerts.html">弹窗</a>
                                    </li>
                                    <li>
                                        <a href="components-typography.html">排版</a>
                                    </li>
                                    <li>
                                        <a href="components-charts.html">统计图</a>
                                    </li>
                                    <li>
                                        <a href="components-maps.html">地图</a>
                                    </li>
                                </ul>
                            </li>

                            <li class="has-submenu">
                                <a href="#"> <i class="fe-bookmark"></i>表单</a>
                                <ul class="submenu">
                                    <li>
                                        <a href="form-elements.html">一般表单元素</a>
                                    </li>
                                    <li>
                                        <a href="form-advanced.html">高级表单</a>
                                    </li>
                                </ul>
                            </li>

                            <li class="has-submenu">
                                <a href="#"> <i class="fe-grid"></i>表格</a>
                                <ul class="submenu">
                                    <li>
                                        <a href="tables-basic.html">基本表格</a>
                                    </li>
                                    <li>
                                        <a href="tables-advanced.html">高级表格</a>
                                    </li>
                                </ul>
                            </li>

                            <li class="has-submenu">
                                <a href="#"> <i class="fe-cpu"></i>图标</a>
                                <ul class="submenu">
                                    <li>
                                        <a href="icons-feather.html">常用图标</a>
                                    </li>
                                    <li>
                                        <a href="icons-mdi.html">材料设计图标</a>
                                    </li>
                                    <li>
                                        <a href="icons-dripicons.html">其他图标</a>
                                    </li>
                                </ul>
                            </li>

                            <li class="has-submenu">
                                <a href="#"> <i class="fe-package"></i>页面</a>
                                <ul class="submenu megamenu">
                                    <li>
                                        <ul>
                                            <li>
                                                <a href="pages-calendar.html">日历</a>
                                            </li>
                                            <li>
                                                <a href="pages-timeline.html">时间轴</a>
                                            </li>
                                            <li>
                                                <a href="pages-invoice.html">发票</a>
                                            </li>
                                            <li>
                                                <a href="pages-contacts.html">联系人</a>
                                            </li>
                                            <li>
                                                <a href="pages-starter.html">起始页</a>
                                            </li>
                                            <li>
                                                <a href="pages-topbar-light.html">头部高亮</a>
                                            </li>
                                        </ul>
                                    </li>
                                    <li>
                                        <ul>
                                            <li>
                                                <a href="pages-login.html">登录</a>
                                            </li>
                                            <li>
                                                <a href="pages-register.html">注册</a>
                                            </li>
                                            <li>
                                                <a href="pages-recoverpw.html">找回密码</a>
                                            </li>
                                            <li>
                                                <a href="pages-lock-screen.html">锁定屏幕</a>
                                            </li>
                                            <li>
                                                <a href="pages-404.html">404错误页面</a>
                                            </li>
                                        </ul>
                                    </li>
                            
                                </ul>
                            </li>

                        </ul>
                        <!-- End navigation menu -->

                        <div class="clearfix"></div>
                    </div>
                    <!-- end #navigation -->
                </div>
                <!-- end container -->
            </div>
            <!-- end navbar-custom -->
        </header>
        <!-- End Navigation Bar-->

        <div class="wrapper">
            <div class="container-fluid">
                        
                <!-- start page title -->
                <div class="row">
                    <div class="col-12">
                        <div class="page-title-box">
                            <div class="page-title-right">
                                <ol class="breadcrumb m-0">
                                    <li class="breadcrumb-item"><a href="#">默笙</a></li>
                                    <li class="breadcrumb-item"><a href="#">组件</a></li>
                                    <li class="breadcrumb-item active">UI 界面元素</li>
                                </ol>
                            </div>
                            <h4 class="page-title">UI 界面元素</h4>
                        </div>
                    </div>
                </div>     
                <!-- end page title --> 

                <div class="row">
                    <div class="col-12">
                        <div class="card">
                            <div class="card-body">
                                <h4 class="header-title">按钮</h4>
                                <p class="text-muted font-14">
                                   使用按钮类 <code>&lt;a&gt;</code>, <code>&lt;button&gt;</code>, 或者 <code>&lt;input&gt;</code> 元素.
                                    加上类 <code>.btn-outline-**</code> 快速创建带边框的按钮。
                                    添加 <code>.btn-rounded</code> 默认按钮以获得圆角。
                                </p>

                                <div class="button-list">
                                    <button type="button" class="btn btn-primary">初级按钮</button>
                                    <button type="button" class="btn btn-secondary">第二按钮</button>
                                    <button type="button" class="btn btn-success">成功</button>
                                    <button type="button" class="btn btn-outline-danger">危险</button>
                                    <button type="button" class="btn btn-outline-warning">警告</button>
                                    <button type="button" class="btn btn-outline-info">信息</button>
                                    <button type="button" class="btn btn-light btn-rounded">发光</button>
                                    <button type="button" class="btn btn-dark btn-rounded">黑色</button>
                                    <button type="button" class="btn btn-pink btn-rounded">粉色</button>
                                    <button type="button" class="btn btn-outline-purple btn-rounded">紫色</button>
                                    <button type="button" class="btn btn-link">超链接</button>
                                </div>

                                <h4 class="header-title mt-4">按钮大小</h4>
                                <p class="text-muted font-14">
                                    添加 <code>.btn-lg</code>, <code>.btn-sm</code> 附加尺寸。
                                </p>

                                <div class="button-list">
                                    <button type="button" class="btn btn-primary btn-lg">大按钮</button>
                                    <button type="button" class="btn btn-info">正常的</button>
                                    <button type="button" class="btn btn-success btn-sm">小按钮</button>
                                </div>

                                <h4 class="header-title mt-4">按钮禁用</h4>

                                <p class="text-muted font-14">
                                    添加<code>disabled</code> 属性到 <code>&lt;button&gt;</code> 按钮上.
                                </p>

                                <div class="button-list">
                                    <button type="button" class="btn btn-info" disabled>信息</button>
                                    <button type="button" class="btn btn-success" disabled>成功</button>
                                    <button type="button" class="btn btn-danger" disabled>危险</button>
                                    <button type="button" class="btn btn-dark" disabled>黑色</button>
                                </div>

                                <h4 class="header-title mt-4">块按钮</h4>

                                <p class="text-muted font-14">
                                    通过添加创建块级按钮 <code>.btn-block</code>.
                                </p>

                                <div class="row">
                                    <div class="col-sm-6">
                                        <button type="button" class="btn btn-block btn-primary">块按钮</button>
                                        <button type="button" class="btn btn-block btn-sm btn-info">块按钮</button>
                                        <button type="button" class="btn btn-block btn-xs btn-success">块按钮</button>
                                    </div>
                                </div>

                                <h4 class="header-title mt-4">按钮组</h4>

                                <p class="text-muted font-14">
                                    在按钮上添加<code>.btn</code>  <code>.btn-group</code>.
                                </p>

                                <div class="btn-group mb-2">
                                    <button type="button" class="btn btn-light">居左</button>
                                    <button type="button" class="btn btn-light">中间</button>
                                    <button type="button" class="btn btn-light">居右</button>
                                </div>

                                <br>

                                <div class="btn-group mb-2">
                                    <button type="button" class="btn btn-light">1</button>
                                    <button type="button" class="btn btn-light">2</button>
                                    <button type="button" class="btn btn-light">3</button>
                                    <button type="button" class="btn btn-light">4</button>
                                </div>

                                <div class="btn-group mb-2">
                                    <button type="button" class="btn btn-light">5</button>
                                    <button type="button" class="btn btn-light">6</button>
                                    <button type="button" class="btn btn-light">7</button>
                                </div>

                                <div class="btn-group mb-2">
                                    <button type="button" class="btn btn-light">8</button>
                                </div>

                                <br>

                                <div class="btn-group mb-2">
                                    <button type="button" class="btn btn-light">1</button>
                                    <button type="button" class="btn btn-primary">2</button>
                                    <button type="button" class="btn btn-light">3</button>
                                    <div class="btn-group">
                                        <button type="button" class="btn btn-light dropdown-toggle" data-toggle="dropdown" aria-expanded="false"> 下拉 <span class="caret"></span> </button>
                                        <div class="dropdown-menu">
                                            <a class="dropdown-item" href="#">下拉按钮</a>
                                            <a class="dropdown-item" href="#">下拉按钮</a>
                                        </div>
                                    </div>
                                </div>

                                <div class="row">
                                    <div class="col-md-3">
                                        <div class="btn-group-vertical mb-2">
                                            <button type="button" class="btn btn-light">顶部</button>
                                            <button type="button" class="btn btn-light">中间</button>
                                            <button type="button" class="btn btn-light">底部</button>
                                        </div>
                                    </div>
                                    <div class="col-md-3">
                                        <div class="btn-group-vertical mb-2">
                                            <button type="button" class="btn btn-light">按钮 1</button>
                                            <button type="button" class="btn btn-light">按钮 2</button>
                                            <button type="button" class="btn btn-light dropdown-toggle" data-toggle="dropdown" aria-expanded="false"> 按钮 3 <span class="caret"></span> </button>
                                            <div class="dropdown-menu">
                                                <a class="dropdown-item" href="#">下拉按钮</a>
                                                <a class="dropdown-item" href="#">下拉按钮</a>
                                            </div>
                                        </div>
                                    </div>
                                </div>

                            </div> <!-- end card-body-->
                        </div> <!-- end card-->
                    </div> <!-- end col -->

                </div>
                <!-- end row -->

                <div class="row">
                    <div class="col-12">
                        <div class="card">
                            <div class="card-body">
                                
                                <h4 class="header-title">模态对话框</h4>

                                <p class="text-muted">
                                    页脚、主体和页脚中的动作集的呈现模式。
                                </p>

                                <!-- sample modal content -->
                                <div id="myModal" class="modal fade" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
                                    <div class="modal-dialog">
                                        <div class="modal-content">
                                            <div class="modal-header">
                                                <h4 class="modal-title" id="myModalLabel">模态标题</h4>
                                                <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
                                            </div>
                                            <div class="modal-body">
                                                <h6>模态中的文本</h6>
                                                <p>这里其实是一个P标签</p>
                                                <hr>
                                                <h6>溢出文本以显示滚动行为</h6>
                                                <p>这里其实也是一个P标签</p>
                                                <p>这里还是一个P标签</p>
                                                <p>emmm  还是一个P标签</p>
                                            </div>
                                            <div class="modal-footer">
                                                <button type="button" class="btn btn-light" data-dismiss="modal">关闭</button>
                                                <button type="button" class="btn btn-primary">保存更改</button>
                                            </div>
                                        </div><!-- /.modal-content -->
                                    </div><!-- /.modal-dialog -->
                                </div><!-- /.modal -->

                                <!--  Modal content for the above example -->
                                <div class="modal fade" id="bs-example-modal-lg" tabindex="-1" role="dialog" aria-labelledby="myLargeModalLabel" aria-hidden="true">
                                    <div class="modal-dialog modal-lg">
                                        <div class="modal-content">
                                            <div class="modal-header">
                                                <h4 class="modal-title" id="myLargeModalLabel">大模态对话框</h4>
                                                <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
                                            </div>
                                            <div class="modal-body">
                                                ...
                                            </div>
                                        </div><!-- /.modal-content -->
                                    </div><!-- /.modal-dialog -->
                                </div><!-- /.modal -->

                                <div class="modal fade" id="bs-example-modal-sm" tabindex="-1" role="dialog" aria-labelledby="mySmallModalLabel" aria-hidden="true">
                                    <div class="modal-dialog modal-sm">
                                        <div class="modal-content">
                                            <div class="modal-header">
                                                <h4 class="modal-title" id="mySmallModalLabel">小模态对话框</h4>
                                                <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
                                            </div>
                                            <div class="modal-body">
                                                ...
                                            </div>
                                        </div><!-- /.modal-content -->
                                    </div><!-- /.modal-dialog -->
                                </div><!-- /.modal -->

                                
                                <div class="modal fade" id="centermodal" tabindex="-1" role="dialog" aria-labelledby="myCenterModalLabel" aria-hidden="true">
                                    <div class="modal-dialog modal-dialog-centered">
                                        <div class="modal-content">
                                            <div class="modal-header">
                                                <h4 class="modal-title" id="myCenterModalLabel">居中模态对话框</h4>
                                                <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
                                            </div>
                                            <div class="modal-body">
                                                <h5>溢出文本以显示滚动行为</h5>
                                                <p>p
                                                标签里放内容</p>
                                                <p>p
                                                标签里放内容</p>
                                            </div>
                                        </div><!-- /.modal-content -->
                                    </div><!-- /.modal-dialog -->
                                </div><!-- /.modal -->

                                <div class="button-list">
                                    <!-- Button trigger modal -->
                                    <button type="button" class="btn btn-primary" data-toggle="modal" data-target="#myModal">标准模态</button>
                                    <!-- Large modal -->
                                    <button type="button" class="btn btn-info" data-toggle="modal" data-target="#bs-example-modal-lg">大模态</button>
                                    <!-- Small modal -->
                                    <button  type="button" class="btn btn-success" data-toggle="modal" data-target="#bs-example-modal-sm">小模态</button>
                                    <!-- Center modal -->
                                    <button  type="button" class="btn btn-primary" data-toggle="modal" data-target="#centermodal">居中模态</button>
                                </div>

                            </div> <!-- end card-body-->
                        </div> <!-- end card-->
                    </div> <!-- end col-->
                </div> <!-- end row-->

                <div class="row">
                    <div class="col-12">
                        <div class="card">
                            <div class="card-body">
                                
                                <h4 class="header-title mb-3">选项卡</h4>

                                <div class="row">
                                    <div class="col-md-6">
                                        <ul class="nav nav-tabs mb-3">
                                            <li class="nav-item">
                                                <a href="#home" data-toggle="tab" aria-expanded="false" class="nav-link">
                                                    主页
                                                </a>
                                            </li>
                                            <li class="nav-item">
                                                <a href="#profile" data-toggle="tab" aria-expanded="true" class="nav-link active">
                                                    简况
                                                </a>
                                            </li>
                                            <li class="nav-item">
                                                <a href="#messages" data-toggle="tab" aria-expanded="false" class="nav-link">
                                                    信息
                                                </a>
                                            </li>
                                        </ul>
                                        <div class="tab-content">
                                            <div class="tab-pane" id="home">
                                                <p>1. 高度默认自适应，也可以随意固宽。 </p>
                                                <p>2. Tab进行了响应式处理，所以无需担心数量多少。</p>
                                            </div>
                                            <div class="tab-pane show active" id="profile">
                                                <p>内容2</p>
                                                
                                            </div>
                                            <div class="tab-pane" id="messages">
                                                <p>内容3</p>
                                            </div>
                                        </div>
            
                                    </div> <!-- end col -->

                                    <div class="col-md-6">
                                        <ul class="nav nav-pills navtab-bg nav-justified mb-3">
                                            <li class="nav-item">
                                                <a href="#home1" data-toggle="tab" aria-expanded="false" class="nav-link">
                                                    主页
                                                </a>
                                            </li>
                                            <li class="nav-item">
                                                <a href="#profile1" data-toggle="tab" aria-expanded="true" class="nav-link active">
                                                    简况
                                                </a>
                                            </li>
                                            <li class="nav-item">
                                                <a href="#messages1" data-toggle="tab" aria-expanded="false" class="nav-link">
                                                    信息
                                                </a>
                                            </li>
                                        </ul>
                                        <div class="tab-content">
                                            <div class="tab-pane" id="home1">
                                                <p>1. 高度默认自适应，也可以随意固宽。 </p>
                                                <p>2. Tab进行了响应式处理，所以无需担心数量多少。</p>
                                            </div>
                                            <div class="tab-pane show active" id="profile1">
                                                <p>内容2</p>
                                            </div>
                                            <div class="tab-pane" id="messages1">
                                                <p>内容3</p>
                                            </div>
                                        </div>                    
                                    </div> <!-- end col -->
                                </div> <!-- end row -->  

                            </div> <!-- end card-body-->
                        </div> <!-- end card-->
                    </div> <!-- end col-->
                </div> <!-- end row-->


                <div class="row">
                    <div class="col-12">
                        <div class="card">
                            <div class="card-body">
                                
                                <h4 class="header-title mb-3">手风琴</h4>

                                <div class="row">
                                    <div class="col-lg-6">
                                        <div id="accordion" class="">
                                            <div class="card mb-0">
                                                <div class="card-header" id="headingOne">
                                                    <h5 class="m-0">
                                                        <a class="text-dark" data-toggle="collapse" href="#collapseOne" aria-expanded="true">
                                                            <i class="mdi mdi-help-circle mr-1 text-primary"></i> 
                                                            你觉得这套模板怎么样？
                                                        </a>
                                                    </h5>
                                                </div>
                                    
                                                <div id="collapseOne" class="collapse show" aria-labelledby="headingOne" data-parent="#accordion">
                                                    <div class="card-body">
                                                        我觉得很好，其实就是这样一个效果    
                                                    </div>
                                                </div>
                                            </div>
                                            <div class="card mb-0">
                                                <div class="card-header" id="headingTwo">
                                                    <h5 class="m-0">
                                                        <a class="text-dark" data-toggle="collapse" href="#collapseTwo" aria-expanded="false">
                                                            <i class="mdi mdi-help-circle mr-1 text-primary"></i> 
                                                            为什么要使用这个？
                                                        </a>
                                                    </h5>
                                                </div>
                                                <div id="collapseTwo" class="collapse" aria-labelledby="headingTwo" data-parent="#accordion">
                                                    <div class="card-body">
                                                        基于BT开发，自适应很强，页面美观
                                                    </div>
                                                </div>
                                            </div>
                                            <div class="card mb-0">
                                                <div class="card-header" id="headingThree">
                                                    <h5 class="m-0">
                                                        <a class="text-dark" data-toggle="collapse" href="#collapseThree" aria-expanded="false">
                                                            <i class="mdi mdi-help-circle mr-1 text-primary"></i> 
                                                            有多少变化？
                                                        </a>
                                                    </h5>
                                                </div>
                                                <div id="collapseThree" class="collapse" aria-labelledby="headingThree" data-parent="#accordion">
                                                    <div class="card-body">
                                                        其实这是一个汉化修改的程序，并不是本人原创的
                                                    </div>
                                                </div>
                                            </div>
                
                                            <div class="card mb-0">
                                                <div class="card-header" id="headingFour">
                                                    <h5 class="m-0">
                                                        <a class="text-dark" data-toggle="collapse" href="#collapseFour" aria-expanded="false">
                                                            <i class="mdi mdi-help-circle mr-1 text-primary"></i> 
                                                            可以填写您的问题
                                                        </a>
                                                    </h5>
                                                </div>
                                                <div id="collapseFour" class="collapse" aria-labelledby="collapseFour" data-parent="#accordion">
                                                    <div class="card-body">
                                                        那这里就是你的答案
                                                    </div>
                                                </div>
                                            </div>
                                        </div> <!-- end #accordions-->
                                    </div> <!-- end col -->
                                    <div class="col-lg-6">
                                        <p>
                                            <a class="btn btn-primary waves-effect waves-light" data-toggle="collapse" href="#collapseExample" aria-expanded="false" aria-controls="collapseExample">
                                                点击展示
                                            </a>
                                            <button class="btn btn-primary waves-effect waves-light" type="button" data-toggle="collapse" data-target="#collapseExample" aria-expanded="false" aria-controls="collapseExample">
                                                按钮与目标日期
                                            </button>
                                        </p>
                                        <div class="collapse show" id="collapseExample">
                                            <div class="card-box">
                                                ABCDEFG等……
                                            </div>
                                        </div>
                                    </div> <!-- end col-->
                                </div> <!-- end row -->  

                            </div> <!-- end card-body-->
                        </div> <!-- end card-->
                    </div> <!-- end col-->
                </div> <!-- end row-->


                <div class="row">
                    <div class="col-12">
                        <div class="card">
                            <div class="card-body">
                                
                                <h4 class="header-title mb-3">卡片</h4>

                                <div class="row">
                                    <div class="col-lg-6 col-xl-3">
        
                                        <!-- Simple card -->
                                        <div class="card d-block">
                                            <img class="card-img-top img-fluid" src="assets/images/small/small-1.jpg" alt="Card image cap">
                                            <div class="card-body">
                                                <h5 class="card-title">标题</h5>
                                                <p class="card-text">这里就是简介咯</p>
                                                <a href="#" class="btn btn-primary">按钮</a>
                                            </div>
                                        </div>
        
                                    </div><!-- end col -->
        
                                    <div class="col-lg-6 col-xl-3">
        
                                        <div class="card d-block">
                                            <img class="card-img-top img-fluid" src="assets/images/small/small-2.jpg" alt="Card image cap">
                                            <div class="card-body">
                                                <h5 class="card-title">标题</h5>
                                                <p class="card-text">在卡片标题上建立一些快速示例文本。</p>
                                            </div>
                                            <ul class="list-group list-group-flush">
                                                <li class="list-group-item">简介</li>
                                            </ul>
                                            <div class="card-body">
                                                <a href="#" class="card-link text-custom">详情</a>
                                                <a href="#" class="card-link text-custom">作者</a>
                                            </div>
                                        </div>
        
                                    </div><!-- end col -->
        
                                    <div class="col-lg-6 col-xl-3">
        
                                        <div class="card d-block">
                                            <img class="card-img-top img-fluid" src="assets/images/small/small-3.jpg" alt="Card image cap">
                                            <div class="card-body">
                                                <p class="card-text">纯文本显示就可以了</p>
                                                <a href="#" class="btn btn-primary">按钮</a>
                                            </div>
                                        </div>
        
                                    </div><!-- end col -->
        
        
                                    <div class="col-lg-6 col-xl-3">
        
                                        <div class="card d-block">
                                            <div class="card-body">
                                                <h5 class="card-title">标题</h5>
                                                <h6 class="card-subtitle text-muted">Support card subtitle</h6>
                                            </div>
                                            <img class="img-fluid" src="assets/images/small/small-4.jpg" alt="Card image cap">
                                            <div class="card-body">
                                                <p class="card-text">不同的风格</p>
                                                <a href="#" class="card-link text-custom">详情</a>
                                                <a href="#" class="card-link text-custom">作者</a>
                                            </div>
                                        </div>
        
                                    </div><!-- end col -->
                                </div>
                                <!-- end row -->   
                                
                                <div class="text-center">
                                    <a href="https://getbootstrap.com/docs/4.1/components/card/" target="_blank">更多卡片风格 （官方网站）</a>
                                </div>

                            </div> <!-- end card-body-->
                        </div> <!-- end card-->
                    </div> <!-- end col-->
                </div> <!-- end row-->

            
                <div class="row">
                    <div class="col-12">
                        <div class="card">
                            <div class="card-body">
                                
                                <h4 class="header-title mb-3">徽章</h4>

                                <div class="row">
                                        <div class="col-md-6">
            
                                            <p class="text-muted m-b-20 font-13">
                                                徽标通过使用相对字体大小调整来匹配即时父元素的大小。 <code class="highlighter-rouge">em</code> 单位.
                                            </p>
        
                                            <span class="badge badge-primary">初级</span>
                                            <span class="badge badge-secondary">次要的</span>
                                            <span class="badge badge-success">成功</span>
                                            <span class="badge badge-danger">危险</span>
                                            <span class="badge badge-warning">警告</span>
                                            <span class="badge badge-info">信息</span>
                                            <span class="badge badge-light">灰色</span>
                                            <span class="badge badge-dark">黑色</span>
            
                                        </div>
            
                                        <div class="col-md-6 mt-md-30">
                                            <p class="text-muted m-b-20 font-13">
                                                使用 <code class="highlighter-rouge">.badge-pill</code> 修饰符类使徽章更圆（用较大的） <code class="highlighter-rouge">border-radius</code> 和 附加水平 <code class="highlighter-rouge">padding</code>). 使用圆形徽章
                                            </p>
        
                                            <span class="badge badge-primary badge-pill">初级</span>
                                            <span class="badge badge-secondary badge-pill">次要的</span>
                                            <span class="badge badge-success badge-pill">成功</span>
                                            <span class="badge badge-danger badge-pill">危险</span>
                                            <span class="badge badge-warning badge-pill">警告</span>
                                            <span class="badge badge-info badge-pill">信息</span>
                                            <span class="badge badge-light badge-pill">灰色</span>
                                            <span class="badge badge-dark badge-pill">黑色</span>
            
                                        </div>
            
                                    </div>
                                    <!-- end row -->            

                            </div> <!-- end card-body-->
                        </div> <!-- end card-->
                    </div> <!-- end col-->
                </div> <!-- end row-->


                <div class="row">
                    <div class="col-12">
                        <div class="card">
                            <div class="card-body">
                            
                                <h4 class="header-title">下拉菜单</h4>
                                <p class="text-muted m-b-20 font-13">
                                    切换上下文叠加来显示链接列表，更多的是引导引导下拉插件。
                                </p>
    
                                <div class="row">
                                    <div class="col-md-6">
    
                                        <p class="mb-1 font-weight-bold">单按钮下拉</p>
                                        <p class="text-muted font-13">
                                            任何单一 <code
                                                class="highlighter-rouge">.btn</code> 可以变成一个下拉
                                           切换与一些标记的变化。下面是如何让他们工作，用任一 <code class="highlighter-rouge">&lt;button&gt;</code>
                                            元素:
                                        </p>
    
                                        <div class="row">
                                            <div class="col-6">
                                                <div class="dropdown">
                                                    <button class="btn btn-light dropdown-toggle" type="button" id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                                                        下拉按钮
                                                    </button>
                                                    <div class="dropdown-menu" aria-labelledby="dropdownMenuButton">
                                                        <a class="dropdown-item" href="#">按钮1</a>
                                                        <a class="dropdown-item" href="#">按钮2</a>
                                                        <a class="dropdown-item" href="#">按钮3</a>
                                                    </div>
                                                </div>
    
                                                <div class="dropdown mt-3">
                                                    <button class="btn btn-light dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                                                        动画下拉
                                                    </button>
                                                    <div class="dropdown-menu dropdown-menu-animated">
                                                        <a class="dropdown-item" href="#">按钮1</a>
                                                        <a class="dropdown-item" href="#">按钮2</a>
                                                        <a class="dropdown-item" href="#">按钮3</a>
                                                    </div>
                                                </div>
                                            </div> <!-- end col -->
    
                                            <div class="col-6">
                                                <div class="dropdown">
                                                    <a class="btn btn-light dropdown-toggle" href="https://example.com" id="dropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                                                        下拉链接
                                                    </a>
    
                                                    <div class="dropdown-menu" aria-labelledby="dropdownMenuLink">
                                                        <a class="dropdown-item" href="#">链接1</a>
                                                        <a class="dropdown-item" href="#">链接2</a>
                                                        <a class="dropdown-item" href="#">链接3</a>
                                                    </div>
                                                </div>
                                            </div> <!-- end col-->
                                        </div> <!-- end row-->
    
    
                                        <p class="mb-1 mt-5 font-weight-bold">增加颜色</p>
                                        <p class="text-muted font-13">
                                            最好的部分是你可以给这些按钮加上颜色：
                                        </p>
    
                                        <div class="btn-group mb-2">
                                            <button type="button" class="btn btn-primary dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">初级</button>
                                            <div class="dropdown-menu">
                                                <a class="dropdown-item" href="#">链接</a>
                                                <a class="dropdown-item" href="#">链接1</a>
                                                <a class="dropdown-item" href="#">链接2</a>
                                                <div class="dropdown-divider"></div>
                                                <a class="dropdown-item" href="#">被分隔开</a>
                                            </div>
                                        </div><!-- /btn-group -->
    
                                        <div class="btn-group mb-2">
                                            <button type="button" class="btn btn-light dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">次要</button>
                                            <div class="dropdown-menu">
                                                <a class="dropdown-item" href="#">链接</a>
                                                <a class="dropdown-item" href="#">链接1</a>
                                                <a class="dropdown-item" href="#">链接2</a>
                                                <div class="dropdown-divider"></div>
                                                <a class="dropdown-item" href="#">被分隔开的</a>
                                            </div>
                                        </div><!-- /btn-group -->
    
                                        <div class="btn-group mb-2">
                                            <button type="button" class="btn btn-success dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">成功</button>
                                            <div class="dropdown-menu">
                                                <a class="dropdown-item" href="#">链接</a>
                                                <a class="dropdown-item" href="#">链接1</a>
                                                <a class="dropdown-item" href="#">链接2</a>
                                                <div class="dropdown-divider"></div>
                                                <a class="dropdown-item" href="#">分割开的</a>
                                            </div>
                                        </div><!-- /btn-group -->
    
                                        <div class="btn-group mb-2">
                                            <button type="button" class="btn btn-info dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">信息</button>
                                            <div class="dropdown-menu">
                                                <a class="dropdown-item" href="#">链接1</a>
                                                <a class="dropdown-item" href="#">链接2</a>
                                                <a class="dropdown-item" href="#">链接3</a>
                                                <div class="dropdown-divider"></div>
                                                <a class="dropdown-item" href="#">分割开的</a>
                                            </div>
                                        </div><!-- /btn-group -->
    
                                        <div class="btn-group mb-2">
                                            <button type="button" class="btn btn-warning dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">警告</button>
                                            <div class="dropdown-menu">
                                                <a class="dropdown-item" href="#">链接</a>
                                                <a class="dropdown-item" href="#">链接1</a>
                                                <a class="dropdown-item" href="#">链接2</a>
                                                <div class="dropdown-divider"></div>
                                                <a class="dropdown-item" href="#">分隔开的链接</a>
                                            </div>
                                        </div><!-- /btn-group -->
    
                                        <div class="btn-group mb-2">
                                            <button type="button" class="btn btn-danger dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">危险</button>
                                            <div class="dropdown-menu">
                                                <a class="dropdown-item" href="#">链接</a>
                                                <a class="dropdown-item" href="#">链接1</a>
                                                <a class="dropdown-item" href="#">链接2</a>
                                                <div class="dropdown-divider"></div>
                                                <a class="dropdown-item" href="#">分隔开的</a>
                                            </div>
                                        </div><!-- /btn-group -->
    
    
                                        <p class="mb-1 mt-5 font-weight-bold">横向菜单</p>
                                        <p class="text-muted font-13">
                                            添加元素右边的触发器下拉菜单 <code>.dropright</code> 到父元素。
                                        </p>
    
                                        <!-- Default dropright button -->
                                        <div class="btn-group mb-2 dropright">
                                            <button type="button" class="btn btn-primary waves-effect waves-light dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                                                测试
                                            </button>
                                            <div class="dropdown-menu">
                                                <a class="dropdown-item" href="#">链接</a>
                                                <a class="dropdown-item" href="#">链接1</a>
                                                <a class="dropdown-item" href="#">链接2</a>
                                                <div class="dropdown-divider"></div>
                                                <a class="dropdown-item" href="#">额外的</a>
                                            </div>
                                        </div>
    
                                        <!-- Split dropright button -->
                                        <div class="btn-group mb-2 dropright">
                                            <button type="button" class="btn btn-primary waves-effect waves-light">
                                                点击箭头显示
                                            </button>
                                            <button type="button" class="btn btn-primary waves-effect waves-light dropdown-toggle-split dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                                                <span class="sr-only">嗯哼</span>
                                            </button>
                                            <div class="dropdown-menu">
                                                <a class="dropdown-item" href="#">链接</a>
                                                <a class="dropdown-item" href="#">链接1</a>
                                                <a class="dropdown-item" href="#">链接2</a>
                                                <div class="dropdown-divider"></div>
                                                <a class="dropdown-item" href="#">额外链接</a>
                                            </div>
                                        </div>
    
    
                                        <p class="mb-1 mt-5 font-weight-bold">向上菜单</p>
                                        <p class="text-muted font-13">
                                            触发器下拉菜单以上元素，通过添加<code class="highlighter-rouge">.dropup</code> 对父元素。
                                        </p>
    
                                        <!-- Default dropup button -->
                                        <div class="btn-group dropup">
                                            <button type="button" class="btn btn-light dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">向上</button>
                                            <div class="dropdown-menu">
                                                <a class="dropdown-item" href="#">链接</a>
                                                <a class="dropdown-item" href="#">链接1</a>
                                                <a class="dropdown-item" href="#">链接2</a>
                                                <div class="dropdown-divider"></div>
                                                <a class="dropdown-item" href="#">额外的</a>
                                            </div>
                                        </div>
    
                                        <!-- Split dropup button -->
                                        <div class="btn-group dropup">
                                            <button type="button" class="btn btn-light">
                                               点击箭头显示
                                            </button>
                                            <button type="button" class="btn btn-light dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                                                <span class="sr-only">点击箭头显示</span>
                                            </button>
                                            <div class="dropdown-menu">
                                                <a class="dropdown-item" href="#">链接</a>
                                                <a class="dropdown-item" href="#">链接1</a>
                                                <a class="dropdown-item" href="#">链接2</a>
                                                <div class="dropdown-divider"></div>
                                                <a class="dropdown-item" href="#">额外的</a>
                                            </div>
                                        </div>
    
                                    </div> <!-- end col -->
    
                                    <div class="col-md-6 mt-md-30">
                                        <p class="mb-1 font-weight-bold">拆分按钮</p>
                                        <p class="text-muted font-13">
                                           类似的，创建与单独按钮几乎相同的标记的拆分按钮，添加 <code class="highlighter-rouge">.dropdown-toggle-split</code> 在下拉插入符周围适当的间距。
                                        </p>
    
    
                                        <div class="btn-group mb-2">
                                            <button type="button" class="btn btn-primary">初级</button>
                                            <button type="button" class="btn btn-primary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                                                <span class="sr-only">Toggle Dropdown</span>
                                            </button>
                                            <div class="dropdown-menu">
                                                <a class="dropdown-item" href="#">链接</a>
                                                <a class="dropdown-item" href="#">链接1</a>
                                                <a class="dropdown-item" href="#">链接2</a>
                                                <div class="dropdown-divider"></div>
                                                <a class="dropdown-item" href="#">额外</a>
                                            </div>
                                        </div><!-- /btn-group -->
    
                                        <div class="btn-group mb-2">
                                            <button type="button" class="btn btn-light">次要</button>
                                            <button type="button" class="btn btn-light dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                                                <span class="sr-only">Toggle Dropdown</span>
                                            </button>
                                            <div class="dropdown-menu">
                                                <a class="dropdown-item" href="#">链接</a>
                                                <a class="dropdown-item" href="#">链接1</a>
                                                <a class="dropdown-item" href="#">链接2</a>
                                                <div class="dropdown-divider"></div>
                                                <a class="dropdown-item" href="#">额外</a>
                                            </div>
                                        </div><!-- /btn-group -->
    
                                        <div class="btn-group mb-2">
                                            <button type="button" class="btn btn-success">成功</button>
                                            <button type="button" class="btn btn-success dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                                                <span class="sr-only">Toggle Dropdown</span>
                                            </button>
                                            <div class="dropdown-menu">
                                                <a class="dropdown-item" href="#">链接</a>
                                                <a class="dropdown-item" href="#">链接1</a>
                                                <a class="dropdown-item" href="#">链接2</a>
                                                <div class="dropdown-divider"></div>
                                                <a class="dropdown-item" href="#">额外</a>
                                            </div>
                                        </div><!-- /btn-group -->
    
                                        <div class="btn-group mb-2">
                                            <button type="button" class="btn btn-info">提示</button>
                                            <button type="button" class="btn btn-info dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                                                <span class="sr-only">Toggle Dropdown</span>
                                            </button>
                                            <div class="dropdown-menu">
                                                <a class="dropdown-item" href="#">链接</a>
                                                <a class="dropdown-item" href="#">链接1</a>
                                                <a class="dropdown-item" href="#">链接2</a>
                                                <div class="dropdown-divider"></div>
                                                <a class="dropdown-item" href="#">额外链接</a>
                                            </div>
                                        </div><!-- /btn-group -->
    
                                        <div class="btn-group mb-2">
                                            <button type="button" class="btn btn-warning">警告</button>
                                            <button type="button" class="btn btn-warning dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                                                <span class="sr-only">Toggle Dropdown</span>
                                            </button>
                                            <div class="dropdown-menu">
                                                <a class="dropdown-item" href="#">链接</a>
                                                <a class="dropdown-item" href="#">链接1</a>
                                                <a class="dropdown-item" href="#">链接2</a>
                                                <div class="dropdown-divider"></div>
                                                <a class="dropdown-item" href="#">额外链接</a>
                                            </div>
                                        </div><!-- /btn-group -->
    
                                        <div class="btn-group mb-2">
                                            <button type="button" class="btn btn-danger">危险</button>
                                            <button type="button" class="btn btn-danger dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                                                <span class="sr-only">Toggle Dropdown</span>
                                            </button>
                                            <div class="dropdown-menu">
                                                <a class="dropdown-item" href="#">链接</a>
                                                <a class="dropdown-item" href="#">链接1</a>
                                                <a class="dropdown-item" href="#">链接2</a>
                                                <div class="dropdown-divider"></div>
                                                <a class="dropdown-item" href="#">额外链接</a>
                                            </div>
                                        </div><!-- /btn-group -->
    
                                        <p class="mb-1 font-weight-bold mt-5">大小</p>
                                        <p class="text-muted font-13">
                                           使用各种大小的按钮，包括默认和拆分下拉按钮。
                                        </p>
    
    
                                        <!-- Large button groups (default and split) -->
                                        <div class="btn-group mb-2">
                                            <button class="btn btn-light btn-lg dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                                                大按钮
                                            </button>
                                            <div class="dropdown-menu">
                                                <a class="dropdown-item" href="#">链接</a>
                                                <a class="dropdown-item" href="#">链接1</a>
                                                <a class="dropdown-item" href="#">链接2</a>
                                                <div class="dropdown-divider"></div>
                                                <a class="dropdown-item" href="#">额外链接</a>
                                            </div>
                                        </div>
    
                                        <div class="btn-group mb-2">
                                            <button class="btn btn-light btn-lg" type="button">
                                               大按钮
                                            </button>
                                            <button type="button" class="btn btn-lg btn-light dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                                                <span class="sr-only">Toggle Dropdown</span>
                                            </button>
                                            <div class="dropdown-menu">
                                                <a class="dropdown-item" href="#">链接</a>
                                                <a class="dropdown-item" href="#">链接1</a>
                                                <a class="dropdown-item" href="#">链接2</a>
                                                <div class="dropdown-divider"></div>
                                                <a class="dropdown-item" href="#">额外链接</a>
                                            </div>
                                        </div>
    
                                        <!-- Small button groups (default and split) -->
                                        <div class="btn-group mb-2">
                                            <button class="btn btn-light btn-sm dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                                                小按钮
                                            </button>
                                            <div class="dropdown-menu">
                                                <a class="dropdown-item" href="#">链接</a>
                                                <a class="dropdown-item" href="#">链接1</a>
                                                <a class="dropdown-item" href="#">链接2</a>
                                                <div class="dropdown-divider"></div>
                                                <a class="dropdown-item" href="#">额外链接</a>
                                            </div>
                                        </div>
    
                                        <div class="btn-group mb-2">
                                            <button class="btn btn-light btn-sm" type="button">
                                                小按钮
                                            </button>
                                            <button type="button" class="btn btn-sm btn-light dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                                                <span class="sr-only">Toggle Dropdown</span>
                                            </button>
                                            <div class="dropdown-menu">
                                                <a class="dropdown-item" href="#">链接</a>
                                                <a class="dropdown-item" href="#">链接1</a>
                                                <a class="dropdown-item" href="#">链接2</a>
                                                <div class="dropdown-divider"></div>
                                                <a class="dropdown-item" href="#">额外链接</a>
                                            </div>
                                        </div>
    
    
                                        <p class="mb-1 mt-5 font-weight-bold">左菜单</p>
                                        <p class="text-muted font-13">
                                            添加元素右边的触发器下拉菜单 <code>.dropleft</code> 到父元素。
                                        </p>
    
                                        <!-- Default dropleft button -->
                                        <div class="btn-group dropleft">
                                            <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                                                向左
                                            </button>
                                            <div class="dropdown-menu">
                                               <a class="dropdown-item" href="#">链接</a>
                                                <a class="dropdown-item" href="#">链接1</a>
                                                <a class="dropdown-item" href="#">链接2</a>
                                                <div class="dropdown-divider"></div>
                                                <a class="dropdown-item" href="#">额外链接</a>
                                            </div>
                                        </div>
    
                                        <!-- Split dropleft button -->
                                        <div class="btn-group">
                                            <div class="btn-group dropleft" role="group">
                                                <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true"
                                                    aria-expanded="false">
                                                    <span class="sr-only">Toggle Dropleft</span>
                                                </button>
                                                <div class="dropdown-menu">
                                                    <a class="dropdown-item" href="#">链接</a>
                                                <a class="dropdown-item" href="#">链接1</a>
                                                <a class="dropdown-item" href="#">链接2</a>
                                                <div class="dropdown-divider"></div>
                                                <a class="dropdown-item" href="#">额外链接</a>
                                                </div>
                                            </div>
                                            <button type="button" class="btn btn-secondary">
                                                左箭头显示
                                            </button>
                                        </div>
    
    
                                        <p class="mb-1 font-weight-bold mt-5">下拉菜单</p>
                                        <p class="text-muted font-13">
                                            添加 <code class="highlighter-rouge">.dropdown-menu-right</code>
                                            到 <code class="highlighter-rouge">.dropdown-menu</code> 向右对齐下拉菜单。
                                        </p>
    
                                        <div class="btn-group">
                                            <button type="button" class="btn btn-light dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                                               这个下拉菜单是右对齐的。
                                            </button>
                                            <div class="dropdown-menu dropdown-menu-right">
                                               <a class="dropdown-item" href="#">链接</a>
                                                <a class="dropdown-item" href="#">链接1</a>
                                                <a class="dropdown-item" href="#">链接2</a>
                                               
                                            </div>
                                        </div>
    
                                    </div> <!-- end col-->
                                </div>
                                <!-- end row -->

                            </div> <!-- end card-body-->
                        </div> <!-- end card-->
                    </div> <!-- end col-->
                </div> <!-- end row-->


                <div class="row">
                    <div class="col-12">
                        <div class="card">
                            <div class="card-body">

                                <div class="row">
                                    <div class="col-md-6">
                                        <h4 class="header-title">分页</h4>
                                        <p class="text-muted m-b-20 font-13">
                                            为您的站点或应用程序提供多页分页组件的分页链接。
                                        </p>
    
                                        <p class="mb-1 font-weight-bold">默认分页</p>
                                        <p class="text-muted font-13">
                                            简单的分页灵感来自RDIO，伟大的应用程序和搜索结果。
                                        </p>
    
                                        <nav>
                                            <ul class="pagination">
                                                <li class="page-item">
                                                    <a class="page-link" href="#" aria-label="Previous">
                                                        <span aria-hidden="true">&laquo;</span>
                                                        <span class="sr-only">以前的</span>
                                                    </a>
                                                </li>
                                                <li class="page-item"><a class="page-link" href="#">1</a></li>
                                                <li class="page-item active"><a class="page-link" href="#">2</a></li>
                                                <li class="page-item"><a class="page-link" href="#">3</a></li>
                                                <li class="page-item"><a class="page-link" href="#">4</a></li>
                                                <li class="page-item"><a class="page-link" href="#">5</a></li>
                                                <li class="page-item">
                                                    <a class="page-link" href="#" aria-label="Next">
                                                        <span aria-hidden="true">&raquo;</span>
                                                        <span class="sr-only">Next</span>
                                                    </a>
                                                </li>
                                            </ul>
                                        </nav>
    
                                        <p class="mb-1 font-weight-bold">大小</p>
                                        <p class="text-muted font-13">
                                            添加 <code> .pagination-lg</code> 或者 <code>.pagination-sm</code> 附加尺寸。
                                        </p>
    
                                        <nav>
                                            <ul class="pagination pagination-lg">
                                                <li class="page-item">
                                                    <a class="page-link" href="#" aria-label="Previous">
                                                        <span aria-hidden="true">&laquo;</span>
                                                        <span class="sr-only">以前的</span>
                                                    </a>
                                                </li>
                                                <li class="page-item"><a class="page-link" href="#">1</a></li>
                                                <li class="page-item"><a class="page-link" href="#">2</a></li>
                                                <li class="page-item"><a class="page-link" href="#">3</a></li>
                                                <li class="page-item">
                                                    <a class="page-link" href="#" aria-label="Next">
                                                        <span aria-hidden="true">&raquo;</span>
                                                        <span class="sr-only">Next</span>
                                                    </a>
                                                </li>
                                            </ul>
                                        </nav>
    
                                        <nav>
                                            <ul class="pagination pagination-sm">
                                                <li class="page-item">
                                                    <a class="page-link" href="#" aria-label="Previous">
                                                        <span aria-hidden="true">&laquo;</span>
                                                        <span class="sr-only">以前的</span>
                                                    </a>
                                                </li>
                                                <li class="page-item"><a class="page-link" href="#">1</a></li>
                                                <li class="page-item"><a class="page-link" href="#">2</a></li>
                                                <li class="page-item"><a class="page-link" href="#">3</a></li>
                                                <li class="page-item">
                                                    <a class="page-link" href="#" aria-label="Next">
                                                        <span aria-hidden="true">&raquo;</span>
                                                        <span class="sr-only">Next</span>
                                                    </a>
                                                </li>
                                            </ul>
                                        </nav>
    
                                        <p class="mb-1 font-weight-bold">对准</p>
                                        <p class="text-muted font-13">
                                            更改分页组件与Fracbox实用工具的对齐方式。
                                        </p>
    
                                        <nav aria-label="Page navigation example">
                                            <ul class="pagination justify-content-center">
                                                <li class="page-item disabled">
                                                    <a class="page-link" href="#" tabindex="-1">上一页</a>
                                                </li>
                                                <li class="page-item"><a class="page-link" href="#">1</a></li>
                                                <li class="page-item"><a class="page-link" href="#">2</a></li>
                                                <li class="page-item"><a class="page-link" href="#">3</a></li>
                                                <li class="page-item">
                                                    <a class="page-link" href="#">下一页</a>
                                                </li>
                                            </ul>
                                        </nav>
    
                                        <nav aria-label="Page navigation example">
                                            <ul class="pagination justify-content-end">
                                                <li class="page-item disabled">
                                                    <a class="page-link" href="#" tabindex="-1">上一页</a>
                                                </li>
                                                <li class="page-item"><a class="page-link" href="#">1</a></li>
                                                <li class="page-item"><a class="page-link" href="#">2</a></li>
                                                <li class="page-item"><a class="page-link" href="#">3</a></li>
                                                <li class="page-item">
                                                    <a class="page-link" href="#">下一页</a>
                                                </li>
                                            </ul>
                                        </nav>
    
                                    </div>
    
                                    <div class="col-md-6 mt-md-30">
                                        <h4 class="header-title">面包屑</h4>
                                        <p class="text-muted m-b-20 font-13">
                                            指示当前页面在导航层次结构中的位置。
                                        </p>
    
                                        <ol class="breadcrumb m-b-20">
                                            <li class="breadcrumb-item active">主页</li>
                                        </ol>
                                        <ol class="breadcrumb m-b-20">
                                            <li class="breadcrumb-item"><a href="#">主页</a></li>
                                            <li class="breadcrumb-item active">详情</li>
                                        </ol>
                                        <ol class="breadcrumb m-b-20">
                                            <li class="breadcrumb-item"><a href="#">主页</a></li>
                                            <li class="breadcrumb-item"><a href="#">详情</a></li>
                                            <li class="breadcrumb-item active">数据</li>
                                        </ol>
    
                                    </div>
    
                                </div>
                                <!-- end row -->


                            </div> <!-- end card-body-->
                        </div> <!-- end card-->
                    </div> <!-- end col-->
                </div> <!-- end row-->


                <div class="row">
                    <div class="col-12">
                        <div class="card">
                            <div class="card-body">
                                
                                <h4 class="header-title">tip提示</h4>
                                <p class="text-muted font-13">添加小的内容覆盖，再次点击才能取消显示</p>
    
    
                                <div class="button-list m-t-20">
                                    <button type="button" class="btn btn-light" data-container="body" title="" data-toggle="popover" data-placement="top" data-content="提示内容，再次点击取消显示" data-original-title="">
                                        上提示
                                    </button>
    
                                    <button type="button" class="btn btn-light" data-container="body" title="" data-toggle="popover" data-placement="bottom" data-content="提示内容，再次点击取消显示" data-original-title="">
                                        下提示
                                    </button>
    
                                    <button type="button" class="btn btn-light" data-container="body" title="" data-toggle="popover" data-placement="right" data-content="提示内容，再次点击取消显示" data-original-title="">
                                        右提示
                                    </button>
    
                                    <button type="button" class="btn btn-light" data-container="body" title="" data-toggle="popover" data-placement="left" data-content="提示内容，再次点击取消显示" data-original-title="Popover title">
                                        左提示
                                    </button>
    
                                    <button type="button" tabindex="0" class="btn btn-primary" data-toggle="popover" data-trigger="focus" title="" data-content="这里有一些令人惊奇的内容。这很吸引人。对吗？" data-original-title="标题">
                                        可拆卸提示
                                    </button>
                                </div>

                            </div> <!-- end card-body-->
                        </div> <!-- end card-->
                    </div> <!-- end col-->
                </div> <!-- end row-->

                <div class="row">
                    <div class="col-12">
                        <div class="card">
                            <div class="card-body">
                                
                                <h4 class="header-title">工具提示</h4>
                                <p class="text-muted font-13">鼠标经过时提示，有四种选择：顶部，右侧，底部，左对齐。</p>
    
                                <div class="button-list m-t-20">
    
                                    <button type="button" class="btn btn-light" data-toggle="tooltip" data-placement="top" title="" data-original-title="上方提示">上提示</button>
    
                                    <button type="button" class="btn btn-light" data-toggle="tooltip" data-placement="bottom" title="" data-original-title="下方提示">下提示</button>
    
                                    <button type="button" class="btn btn-light" data-toggle="tooltip" data-placement="left" title="左方提示">左提示</button>
    
                                    <button type="button" class="btn btn-light" data-toggle="tooltip" data-placement="right" title="" data-original-title="右方提示">右提示</button>
                                </div>

                            </div> <!-- end card-body-->
                        </div> <!-- end card-->
                    </div> <!-- end col-->
                </div> <!-- end row-->


                <div class="row">
                    <div class="col-12">
                        <div class="card">
                            <div class="card-body">
                                
                                <h4 class="header-title mb-0">进度条</h4>
                                
                                <div class="row">
                                    <div class="col-md-6 mt-3">
                                        <h5 class="font-weight-normal">基本实例</h5>
            
                                        <p class="text-muted font-13">
                                            默认进度条。
                                        </p>
            
                                        <div class="progress mb-2">
                                            <div class="progress-bar" role="progressbar" aria-valuenow="0" aria-valuemin="0" aria-valuemax="100"></div>
                                        </div>
                                        <div class="progress mb-2">
                                            <div class="progress-bar" role="progressbar" style="width: 33%" aria-valuenow="33" aria-valuemin="0" aria-valuemax="100"></div>
                                        </div>
                                        <div class="progress mb-2">
                                            <div class="progress-bar" role="progressbar" style="width: 66%" aria-valuenow="66" aria-valuemin="0" aria-valuemax="100"></div>
                                        </div>
                                        <div class="progress mb-2">
                                            <div class="progress-bar" role="progressbar" style="width: 100%" aria-valuenow="100" aria-valuemin="0" aria-valuemax="100"></div>
                                        </div>
                                        <div class="progress mb-0">
                                            <div class="progress-bar" role="progressbar" style="width: 25%;" aria-valuenow="25" aria-valuemin="0" aria-valuemax="100">25%</div>
                                        </div>
                                    </div> <!-- end col -->
                
                                    <div class="col-md-6 mt-3">
                                        <h5 class="font-weight-normal">带样式的进度条</h5>
            
                                        <p class="text-muted font-13">
                                            进度条使用一些相同的按钮和警报类来实现一致的样式。   
                                        </p>
            
                                        <div class="progress mb-2">
                                            <div class="progress-bar bg-success" role="progressbar" style="width: 25%" aria-valuenow="25" aria-valuemin="0" aria-valuemax="100"></div>
                                        </div>
                                        <div class="progress mb-2">
                                            <div class="progress-bar bg-info" role="progressbar" style="width: 50%" aria-valuenow="50" aria-valuemin="0" aria-valuemax="100"></div>
                                        </div>
                                        <div class="progress mb-2">
                                            <div class="progress-bar bg-warning" role="progressbar" style="width: 75%" aria-valuenow="75" aria-valuemin="0" aria-valuemax="100"></div>
                                        </div>
                                        <div class="progress mb-2">
                                            <div class="progress-bar bg-danger" role="progressbar" style="width: 100%" aria-valuenow="100" aria-valuemin="0" aria-valuemax="100"></div>
                                        </div>
                                        <div class="progress mb-0">
                                            <div class="progress-bar" role="progressbar" style="width: 15%" aria-valuenow="15" aria-valuemin="0" aria-valuemax="100"></div>
                                            <div class="progress-bar bg-success" role="progressbar" style="width: 30%" aria-valuenow="30" aria-valuemin="0" aria-valuemax="100"></div>
                                            <div class="progress-bar bg-info" role="progressbar" style="width: 20%" aria-valuenow="20" aria-valuemin="0" aria-valuemax="100"></div>
                                        </div>
                                    </div> <!-- end col -->
                                </div>
                                <!-- end row -->
                
                
                                <div class="row">
                                    <div class="col-md-6 mt-3">
                                        <h5 class="font-weight-normal">条纹样例</h5>
            
                                        <p class="text-muted font-13">
                                            使用渐变来创建条带效果的进度条。
                                        </p>
            
                                        <div class="progress mb-2">
                                            <div class="progress-bar progress-bar-striped" role="progressbar" style="width: 10%" aria-valuenow="10" aria-valuemin="0" aria-valuemax="100"></div>
                                        </div>
                                        <div class="progress mb-2">
                                            <div class="progress-bar progress-bar-striped bg-success" role="progressbar" style="width: 25%" aria-valuenow="25" aria-valuemin="0" aria-valuemax="100"></div>
                                        </div>
                                        <div class="progress mb-2">
                                            <div class="progress-bar progress-bar-striped bg-info" role="progressbar" style="width: 50%" aria-valuenow="50" aria-valuemin="0" aria-valuemax="100"></div>
                                        </div>
                                        <div class="progress mb-2">
                                            <div class="progress-bar progress-bar-striped bg-warning" role="progressbar" style="width: 75%" aria-valuenow="75" aria-valuemin="0" aria-valuemax="100"></div>
                                        </div>
                                        <div class="progress mb-2">
                                            <div class="progress-bar progress-bar-striped bg-danger" role="progressbar" style="width: 100%" aria-valuenow="100" aria-valuemin="0" aria-valuemax="100"></div>
                                        </div>
                                        <div class="progress mb-0">
                                            <div class="progress-bar progress-bar-striped progress-bar-animated" role="progressbar" aria-valuenow="75" aria-valuemin="0" aria-valuemax="100" style="width: 75%"></div>
                                        </div>
                                    </div> <!-- end col -->
                
                                    <div class="col-md-6 mt-3">
                                        <h5 class="font-weight-normal">尺寸示例</h5>
            
                                        <p class="text-muted font-13">
                                            我们只设置了一个 <code>height</code> 值在 <code>.progress</code>, 所以如果你改变了这个值 <code>.progress-bar</code> 将自动调整大小。
                                        </p>
            
                                        <div class="progress mb-2" style="height: 1px;">
                                            <div class="progress-bar" role="progressbar" style="width: 70%;" aria-valuenow="70" aria-valuemin="0" aria-valuemax="100"></div>
                                        </div>
                                        <div class="progress mb-2 progress-sm">
                                            <div class="progress-bar" role="progressbar" style="width: 30%;" aria-valuenow="30" aria-valuemin="0" aria-valuemax="100"></div>
                                        </div>
                                        <div class="progress mb-2 progress-md">
                                            <div class="progress-bar bg-success" role="progressbar" style="width: 25%" aria-valuenow="25" aria-valuemin="0" aria-valuemax="100"></div>
                                        </div>
                                        <div class="progress mb-2 progress-lg">
                                            <div class="progress-bar bg-info" role="progressbar" style="width: 50%" aria-valuenow="50" aria-valuemin="0" aria-valuemax="100"></div>
                                        </div>
                                        <div class="progress mb-2 progress-xl">
                                            <div class="progress-bar bg-warning" role="progressbar" style="width: 75%" aria-valuenow="75" aria-valuemin="0" aria-valuemax="100"></div>
                                        </div>
                                        <div class="progress progress-xxl">
                                            <div class="progress-bar bg-danger" role="progressbar" style="width: 38%" aria-valuenow="38" aria-valuemin="0" aria-valuemax="100"></div>
                                        </div>
                                    </div> <!-- end col -->
                                </div>
                                <!-- end row --> 

                            </div> <!-- end card-body-->
                        </div> <!-- end card-->
                    </div> <!-- end col-->
                </div> <!-- end row-->
                
            </div> <!-- end container -->
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